Statement Of Changes In Equity [Abstract]

JCDecaux SA - Filing #5982711

Concept	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Increase (decrease) through change in equity of subsidiaries, equity	218,000,000 EUR	135,000,000 EUR	188,000,000 EUR	—	105,000,000 EUR	105,000,000 EUR	83,000,000 EUR	72,000,000 EUR	404,000,000 EUR	—	0 EUR	333,000,000 EUR	72,000,000 EUR
Purchase of treasury shares	—	487,000,000 EUR	—	487,000,000 EUR	—	0 EUR	487,000,000 EUR	—	360,000,000 EUR	360,000,000 EUR	0 EUR	—	360,000,000 EUR
Sale or issue of treasury shares	—	465,000,000 EUR	5,000,000 EUR	469,000,000 EUR	—	0 EUR	465,000,000 EUR	2,000,000 EUR	375,000,000 EUR	373,000,000 EUR	0 EUR	—	375,000,000 EUR